/* agent must be locked */
static struct ice_candidate_pair *__learned_candidate(struct ice_agent *ag, struct packet_stream *ps,
struct sockaddr_in6 *src, struct interface_address *ifa, unsigned long priority)
{
struct ice_candidate *cand, *old_cand;
struct ice_candidate_pair *pair;
struct call *call = ag->call;
cand = g_slice_alloc0(sizeof(*cand));
cand->component_id = ps->component;
cand->transport = ITP_UDP;
cand->priority = priority;
cand->endpoint.ip46 = src->sin6_addr;
cand->endpoint.port = ntohs(src->sin6_port);
cand->type = ICT_PRFLX;
__cand_ice_foundation(call, cand);
old_cand = __foundation_lookup(ag, &cand->foundation, ps->component);
if (old_cand && old_cand->priority > priority) {
/* this is possible if two distinct requests are received from the same NAT IP
* address, but from different ports. we cannot distinguish such candidates and
* will drop the one with the lower priority */
g_slice_free1(sizeof(*cand), cand);
pair = __pair_lookup(ag, old_cand, ifa);
if (pair)
goto out; /* nothing to do */
cand = old_cand;
goto pair;
}
g_queue_push_tail(&ag->remote_candidates, cand);
g_hash_table_insert(ag->candidate_hash, cand, cand);
g_hash_table_insert(ag->foundation_hash, cand, cand);
pair:
pair = __pair_candidate(ifa, ag, cand, ps);
PAIR_SET(pair, LEARNED);
__all_pairs_list(ag);
out:
return pair;
}
/* agent must be locked */
static struct ice_candidate_pair *__learned_candidate(struct ice_agent *ag, struct stream_fd *sfd,
const endpoint_t *src, unsigned long priority)
{
struct ice_candidate *cand, *old_cand;
struct ice_candidate_pair *pair;
struct call *call = ag->call;
struct packet_stream *ps = sfd->stream;
cand = g_slice_alloc0(sizeof(*cand));
cand->component_id = ps->component;
cand->transport = sfd->local_intf->spec->local_address.type; // XXX add socket type into socket_t?
cand->priority = priority;
cand->endpoint = *src;
cand->type = ICT_PRFLX;
__cand_ice_foundation(call, cand);
old_cand = __foundation_lookup(ag, &cand->foundation, ps->component);
if (old_cand && old_cand->priority > priority) {
/* this is possible if two distinct requests are received from the same NAT IP
* address, but from different ports. we cannot distinguish such candidates and
* will drop the one with the lower priority */
g_slice_free1(sizeof(*cand), cand);
pair = __pair_lookup(ag, old_cand, sfd->local_intf);
if (pair)
goto out; /* nothing to do */
cand = old_cand;
goto pair;
}
g_queue_push_tail(&ag->remote_candidates, cand);
g_hash_table_insert(ag->candidate_hash, cand, cand);
g_hash_table_insert(ag->foundation_hash, cand, cand);
pair:
pair = __pair_candidate(sfd, ag, cand);
PAIR_SET(pair, LEARNED);
__all_pairs_list(ag);
out:
return pair;
}
